Reporting Server rsAccessDenied Windows 7,8

If you install SQL Reporting Server on Windows 7, 8 and you want to start to configure it, even as administrator, you will get following exception:

The permissions granted to user ‘domain\username’ are insufficient for performing this operation.

The solution that is provided in the MSDN library, saying that you should start the Internet Explorer as local administrator or adding the host trusted site would not work. After hours of search, I found an interesting post saying that the only thing you should do is to create following registry-key: